Transcript Technical issues

Technical Issues
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Dark fibre is becoming more ubiquitous
– Still need to find out if/where it exists in some places.
– Investigate use of dark fibre in possession of NREN by other
NRENs.
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Investigate transmission equipment (L1)
– How to drive down costs (integrating ports, regeneration or
amplification etc..)?
– Which transmission protocol to use (SDH, GE or 10GBase)?
– Moving to fewer devices in core?
– Have one-to-one discussions with industry vendors.
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Agreed that multi-domain, multi-vendor hybrid networks are the
future.
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How to achieve inter(-optical) domain model?
Problems with ‘not-quite-compatible’ standards. Work with vendors and
standard bodies on interoperability issues (e.g. in control plane)
Management and policy issues to resolve.
EARNEST Workshop, 24 May 2006
Kevin Meynell <[email protected]>
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Technical Issues
• Bandwidth allocation
– Stick with IP that is best effort and solve problem with
overprovisioning and/or separate networks for demanding
users?
– Develop bandwidth reservation techniques (at control plane
and/or middleware levels)?
– Will the sharing of network capacity only become feasible
when bandwidth becomes so cheap and abundant that noone cares about it?
• Testbed networks
– The ability to undertake disruptive testing is required.
– Potentially need to test new lower-layer protocols.
– Need to be neutral, long-distance and multi-vendor.
EARNEST Workshop, 24 May 2006
Kevin Meynell <[email protected]>
2
Technical Issues
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Network management
– Use of IPv4, IPv6 or something new (GENI?)
– Should everyone have a public IP address?
– Firewalls and NATs complicate management and force protocols to
be used for unsuitable tasks.
– How to manage multiple VLANs?
– Concerns about increasing network management complexity with
separate optical, IP (and other?) layers to manage.
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Wider issues
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Investigate scaling of large AAI federations.
Focus so much on Grid requirements?
Work more closely with vendors as to community requirements.
General trend to support more, but smaller users (e.g. schools).
EARNEST Workshop, 24 May 2006
Kevin Meynell <[email protected]>
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